<?php
abstract class Ext_Model
{ 
	protected $_mapper;
    public function __construct(array $options = null)
    {
        if (is_array($options)) {
            $this->setOptions($options);
        }
    }

    public function __set($name, $value)
    {
        $method = 'set' . $name;
        if (('mapper' == $name) || !method_exists($this, $method)) {
            throw new Exception('Invalid guestbook property');
        }
        $this->$method($value);
    }

    public function __get($name)
    {
        $method = 'get' . $name;
        if (('mapper' == $name) || !method_exists($this, $method)) {
            throw new Exception('Invalid guestbook property');
        }
        return $this->$method();
    }
    public function setOptions(array $options)
    {
        $methods = get_class_methods($this);
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (in_array($method, $methods)) {
                $this->$method($value);
            }
        }
        return $this;
    }
    public function save()
    {
        $this->getMapper()->save( $this );
    }

    public function find( $id )
    {
        $this->getMapper()->find($id, $this);
        return $this;
    }

    public function fetchAll( $where = null)
    {
        return $this->getMapper()->fetchAll( $where );
    }

    public function setMapper( $mapper )
    {
        $this->_mapper = $mapper;
        return $this;
    }
    public function getMapper()
    {
        if (null === $this->_mapper) {
            $this->setMapper( new $this->_modelMapperDefault() );
        }
        return $this->_mapper;
    }    
    public function select()
    {
        return new Zend_Db_Table_Select( new $this->_model() );
    }    
}